Biometrics for Robots: Why Every Humanoid AI Needs a Hardware Fingerprint

Worldcoin scans your iris to prove you're human. What proves a robot is a specific robot - not a clone, not a spoofed replica, not a digital twin running copied firmware on different hardware? Nothing. Right now, nothing does. Tesla plans to ship millions of Optimus units. Figure, Boston Dynamics, and Agility are ramping humanoid production. Each machine contains unique compute: motor controllers, sensor fusion SoCs, edge AI accelerators, inference processors. Every chip that rolls off a fab line has manufacturing variance baked into the silicon at the atomic level.